This is one of a collection of rude emoticons that's not so rude that we need to make it an x rated emoticon; after all it's just female anatomy. Adult msn emoticons like this are as tame as a biology class at school. We have however classified big boobs as an 'emoticons adult'. When used in the right context, adult msn emoticons like this can be very funny. Although this emoticon is designed to be an adult msn emoticon you can also you use it as an adult yahoo emoticon in Yahoo Mail or in email and blogs. Men love anything to do with boobs which is perhaps why this image is so popular.